Elevator-gate-operating mechanism.



l. J. DULLE.

ELEVATOR GATE OPERATING MECHANISM.

APPLICATION FILED FEB. 14. 1916.

1,206,21 2. Patented Nov. 28, 1916.

2 SHEETS-SHEET I.

INVENTOB WITNESS l. l. DULLE. ELEVATOR GATE OPERATING MECHANISM.

APPLlCATION FILED FEB-14' 1916- 2 SHEETS-SHEET 2.

Patented Nov. 28, 1916.

ORIVEY JOSEPH J. DULLE, OF KANSAS CITY, MISSOURI.

ELEVATOR-GATE-OPERATING MECHANISM.

To all whom it may concern:

Be it known that I, JOSEPH J. DULLE, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Elevator-Gatethe floor of the car attains the level. of the landing and which regulates and controls the closing of the gates as the car moves upward or downward fromsuch landing.

'With this general object in view, the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accom panying drawings, inwhich Figure 1, is a plan view of an elevator car in its shaft and of gate operating mechanism embodying my invention. Fig. 2, is a broken elevation of a two-member gate, de-

sirable for use in connection with operating and controlling mechanism. Fig. 3, is a vertical section taken on the line I'IIIII of Fig. 1. Fig. 4, is a vertical section on the line IV-IV of Fig. 3.

In the said drawing, 1 indicates an elevator shaft and 2 vertical guides therein for the elevator car 3 which may be raised and lowered by means of the usual sustaining cable a or otherwise.

5 indicates one of the floor landings of the building. For controlling the opening at each landing for access to and from the car,

I preferably provide a gate consisting of a lower member 7 adapted for telescoping within an upper hollow member 8. this construction of gate being desirable for a reason hereinafter explained.

Secured to one of theside walls of the shaft adjacent each gate, is a vertical bar 9, and secured to said bar is a guide frame consisting of upper and lower castings 10 and 11 connected by vertical rods 12 .and mounted slidingly on said rods is a frame 13 provided with vertical guide rods 14: upon which counterbalance weights 15 are detachably fitted in any suitable manner.

Specification of Letters Patent.

Patented Nov. 28, 1916'.

Application filed February 14, 1916. Serial No. 78,286.

Journaled in casting 10 is a sheave 16 provided preferably with .a pair-of grooves as shown clearly in Fig. 4, and journaled in the upper part of slide frame 13is a similar sheave 17. A cable 18 wound around Said sheaves in a manner common in block and tackle construction is secured at one end to the casting 10 and at its opposite end it extends through an opening 19 in the upper member 8 of the gate and is secured at its lower end to the lower member 7 of the gate as shown in Fig. 2.

From the gate the cable extends vertically upward to about the horizontal plane of the sheave 16 and then extends over a -sheave 19 and around a horizontally arranged I sheave 20 --j ournale'din a bearing bracket 21 secured like sheave 19 to the wall of the shaft, and

from the sheave 20 the cable extends horizontally to the block and tackle mechanism as shown most clearly in Fig. 1.

By this arrangement it will be seen that when the slide frame 13 is moved downward a predetermined distance ina manner here inafter explained, the gates are raised four times the distance which the frame moves because of the use of double sheaves in the block and tackle mechanism, that is to say if the frame is moved downward two feet, the gate is raised eight feet, it being noted however, that by employing a two-member telescoping gate, the inertia of the entire gate does not have to be overcome at one time, as the lower member is alone lifted until it is telescoped within the upper-member, the strain of lifting the gate is therefore applied gradually toithe lifting mecha- IllSIIl. 1

22 is a cable attached at its upperend to the weight-carrying frame 1-3 and having a swivelconnection at its lower end at 23, to the toothed wheel 24 journaled on astubshaft 25 secured to the bar 9, said wheel being weighted at 26 so as to stand in the position shown by Fig. 3 when in its normal position, that is when the gate is closed.

To open the gate and to permit itto close landing, it being noted that the wheel is of such proportionthat when it makes a half turn it imposes full travel downward to the weighted frame or perm ts sald frameto be llO a position shown tooth of the rack bar shall engage a preraised its full distance. To insure this operation the rack bar is provided with the same number of teeth as the wheel and the teeth 28 of the rack bar are spaced apart for proper engagement with the teeth of the wheel.

Assuming that the is closed and that the car has descended until the lower tooth of its rack bar engages a tooth of the wheel, as shown in Fig. 3, it will be apparent that continued downward movement of the car will rotate the wheel in the direction indicated by the arrow, Fig. 3, and that by the time the wheel has completed a half revolution, the weighted frame will have descended to about the position shown by the dotted line 29, Fig. 3, and that consequently the gate has been fully opened. It will be understood of course that as the parts mentioned attain the said positions the floor of the car will be level with the landing, so that access may be had to and from the car.

If the downward movement of the car is continued, the rotation of the wheel will be continued in the same direction and as the last tooth of the rack bar leaves the wheel, the latter'will have completed its revolution. During this second half revolution of the wheel, the swivel connection 23 will move upward and thus permit the gate to move downward and reelevate the weighted frame, it being of course understood, that by the time the two members of the gate have moved downward to half-way position, the upper member 8 will be arrested by suitable stops, such as brackets 30 secured to the wall of the hatchway, and that the swivel connection will lie in the horizontal plane of the axis of the wheel and the weighted frame will have completed half of its upward travel, the weight of the lower member of the gate will be sulficient to complete the reelevation of the weighted frame and the wheel 24 will through gravity continue its revolution under the impelling force of the rack-bar.

If the operator after stopping the car at a landing causes the same to reascend instead of continuing downward, the wheel of course will be rotated backward a half revolution to its normal position and the gate will close automatically and reelevate the weighted frame.

The wheel 2-4: is weighted so that it can be depended upon to stand normally in the by Fig. 3, so that the first determined tooth of the wheel. Thls is essential in order to insure a uniform travel of the gate at all times, regardless of any looseness or play which may develop through a slight stretching of the cable 22 or through any slight looseness or play which may develop through wear in any of the parts.

For convenience of illustration the rack bar is shown as extending downward below the bottom of the elevator car, but it will be understood that in practice it will not be necessary for it to project below the bottom of the car. 7

From the above description it will be apparent that I have produced a construction whereby the elevator in its travel shall effect the opening of the gates of the different floors without sustaining any lateral or twisting strains and without material shock or jar due to the fact that the counterbalance weights carry part of the load and furthermore because the gate is sectional and the entireweight of the same does not have to be overcome in the initial opening movement and that by weighting the wheel, it can be depended upon to always stand in a predetermined position when the gate is closed.

It will be apparent that the invention is susceptible of modifications in the form, detail construction and parts without departing from the principle of construction involved, or sacrificing any of the advantages of the appended claims.

I claim:

1. An elevator gate operating mechanism comprising in combination with an-elevator car and a landing gate, a vertically slidable weight, a toothed wheel yieldingly held in a predetermined position with respect to the weight when the latter is elevated, a connection between said weight and said wheel whereby the rotation of the latter a certain distance shall pull the weight downward a predetermined distance and a second rotation of said wheel the same distance shall leave the weight free to be moved upward, a rack bar on the car for imparting such movements to said wheel in the travel of said car, and a block and tackle connection be-.

tween the weight and the gate whereby downward movement imparted to the former shall open the gate and whereby said gate shall reelevate the weight when the rack bar imparts the said second rotation to said wheel.

2. An elevator gate operating mechanism comprising in combination with an elevator organization of the car and a landing gate, a vertically slidable weight, a toothed wheel below the weight and provided with a weighted portion for normally holding the wheel in a predetermined position, a cable having a swivel connection at its lower end with the wheel at a point diametrically opposite the weighted portion of the latter and attached at its upper end to the slidable weight, a block and tackle connection between the upper end of the slidable weight and the gate, and a vertical rack bar secured to the elevator car and adapted to impart a half revolution to the wheel by the time the car arrives at the landing with which the Wheel is asso ciated and to impart a second half revolution to the wheel upon moving away from said landing to restore the wheel to normal position.

3. An elevator gate operating mechanism comprising in combination with an elevator car and a landing gate, a support in the elevator shaft, a vertical guide secured to the support, a slidable weight mounted on the guide and adapted to be arrested in its descent by the latter if such travel exceeds a predetermined range of movement, sheaves journaled in the upper part of the guide and weight, a cable suitably guided and extending around said sheaves and attached at one end to a fixed point and at its other end to the gate, a toothed Wheel journaled on the support below the guide, a connection pivoted at one end to the Weight and having a swivel connection at its opposite end With the toothed Wheel, and a rack bar secured to the elevator car and adapted for rotating the toothed wheel 'a single revolution in passing the same; said wheel having a weighted portion diametrically opposite said swivel connection for normally holding the wheel in a predetermined position;

In testimony whereof I aflix my signature in the presence of two Witnesses. r

JOSEPH J. DULLE. Witnesses: V r

H. C. RODGERS,- G. Y. THORPE.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

